This may be too late for this project, but I will tell you about a problem I once faced with inconsistent and ravel-y seams in a block swap. Instead of ripping and remaking blocks that someone else had assembled, I pressed well and topstitched each seam before putting the blocks together in a top.
the topstitching held the seam flat and prevented anymore raveling. I've washed and dried this quilt often since 1995 and it is still going strong.